已知等差数列{an}满足：a10=1，S20=0． （1）求数列{|an|}的前

在呼叫拦截过程中要用到CBA值，请问该值可从哪儿获得？（）

A.IMSI分析

B.入局路由

C.D表分析

D.E表分析

补全对话，每空一词。

A: Where have you been ?

B: I've   _1_   to the shops. Look, I bought this hat.

A: It's pretty. Did you   _2_  with Jenny?

B: No.

A:   _3   is she then?

B: She has   _4_   to the park. She'll be back   _5_   about five o'clock.

A: To the park again? She's gone to the park every day this week!

B: That's because she plays tennis there.

Nowadays there are still a number of students        school at various grades due to a lack of money in

some poorer areas.[ ]

A. leaving out

B. making out

C. letting out

D. dropping out

消化道中发病率最低的恶性肿瘤是（）。

A.食管

B.胃

C.小肠肿瘤

D.结肠

E.直肠

湿疹发病急，皮损潮红、肿胀、糜烂、流水、瘙痒，治疗原则是：（）

A.润燥养血

B.清热泻火

C.清热凉血

D.清热利湿

E.健脾除湿